CN112092915B

CN112092915B - Side vehicle body structure

Info

Publication number: CN112092915B
Application number: CN202010182249.4A
Authority: CN
Inventors: 山崎忠; 中村岳司
Original assignee: Mazda Motor Corp
Current assignee: Mazda Motor Corp
Priority date: 2019-06-18
Filing date: 2020-03-16
Publication date: 2022-11-04
Anticipated expiration: 2040-03-16
Also published as: US20200398897A1; EP3753812A1; JP7354606B2; CN112092915A; JP2020203596A; US11279411B2

Abstract

The present invention aims to suppress the weight of a side member from increasing and to improve the flexural rigidity against a load in the vehicle width direction at the time of a side collision. The invention comprises the following steps: a vehicle body structure is provided with a side member (4), a wheel house (90) having a front lower part (92 a) rising from the rear part of the side member (4), a center pillar (5) extending upward from the middle part of the side member (4), and a door (6) opening and closing an opening (2 r) formed above the side member (4) and behind the center pillar (5), wherein when the door (6) is closed, the rear part (63 r) of an impact beam (63) on which the door (6) is placed overlaps the rear part of the side member (4) in a vehicle side view, the side member (4) is provided with a side member reinforcing member (30U) for reinforcing the bending rigidity against a load applied to the vehicle width inner side, and the side member reinforcing member (30U) is provided at least in the middle part (4 Ra) of the side member and the rear part of the side member (4) where the center pillar (5) in the longitudinal direction of the side member (4) is located.

Description

Side vehicle body structure

Technical Field

The present invention relates to a side body structure including: the vehicle body structure includes a side member having a closed cross-sectional structure extending in a vehicle front-rear direction, a wheel house having a front lower portion standing from a rear portion of the side member, a center pillar having a closed cross-sectional structure extending upward from the side member, and a door opening and closing an opening portion formed above the side member and behind the center pillar.

Background

In a vehicle side collision (hereinafter, referred to as a "side collision"), although the collision position of a collision object against the vehicle side surface varies, a load toward the vehicle width inner side (cabin side) is input to the side member in accordance with the input of the load from the center pillar (that is, a load causing a bending deformation in which a joint portion with the center pillar in the longitudinal direction of the side member is displaced toward the vehicle width inner side in a vehicle plan view).

In order to protect the vehicle occupant from such a side collision, a structure for reinforcing the side member against the load inward in the vehicle width direction is proposed in patent document 1 below, for example.

The side member of patent document 1 includes a side member reinforcement including a base member and an extension member connected to a rear end portion of the base member in a longitudinal direction of the side member.

The extension member has a connecting portion fixed to the base member, and the connecting portion is fixed to a rear end portion of the base member by welding or the like from the inside of the vehicle width. Thereby, the connecting portion of the extension member and the base member is reinforced by the overlapping structure of the connecting portion of the extension member and the rear end portion of the base member.

On the other hand, in recent years, there has been an increasing demand for weight reduction of a vehicle body in order to improve fuel efficiency and traveling performance, and in particular, it has been required to achieve weight reduction of a vehicle body (side member) while ensuring safety against side collision of a vehicle occupant.

The side member of patent document 1 can improve the bending rigidity against a load toward the vehicle width inner side by adopting the overlapping structure at least at the connecting portion, but since the entire connecting portion from the upper end to the lower end of the connecting portion, that is, the entire connecting portion of the cross-sectional shape orthogonal to the longitudinal direction of the connecting portion is made to have the overlapping structure, there is room for further reducing the weight of the side member.

For example, in a side member in a side collision, since a side collision load is input to a joint portion with a center pillar through the center pillar, it is effective to partially reinforce the joint portion with the center pillar from the viewpoint of weight reduction, but in this case, there is a possibility that a difference in rigidity is generated between a region where the center pillar is located and peripheral portions on the front and rear sides thereof in the longitudinal direction of the side member, and reinforcing the entire longitudinal direction is disadvantageous in suppressing the weight of the side member.

Therefore, the inventors of the present application have noted that it is effective to design a vehicle body member other than the center pillar provided around the side member while suppressing an increase in weight of the side member and reinforcing the side member.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2018-118697.

Disclosure of Invention

Technical problems to be solved by the invention

The present invention has been made in view of the above-described problems, and an object thereof is to provide a side body structure capable of suppressing the weight increase of a side member and improving the bending rigidity against a load inward in the vehicle width direction at the time of a side collision.

Means for solving the problems

The present invention is a side vehicle body structure including:

side beam: a closed cross-sectional structure extending in a vehicle front-rear direction;

a wheel cover: a front lower part standing from a rear part of the side member;

central column: a closed cross-sectional structure extending upward from a middle portion of the side member;

vehicle door: and opening and closing an opening portion that opens above the side member and behind the center pillar, wherein when the door is closed, a rear portion of the impact beam on the door overlaps a rear portion of the side member in a vehicle side view, the side member includes a side member reinforcing member for reinforcing bending rigidity against a load inward in a vehicle width direction, and the side member reinforcing member is provided at least in an intermediate portion of the side member where the center pillar is located and in the rear portion of the side member in a longitudinal direction of the side member.

According to the above aspect, since the side member reinforcing members are provided at least at the intermediate portion of the side member and at the rear portion of the side member in the longitudinal direction of the side member, the side member reinforcing members can reliably receive a side collision load when the side collision load is dispersed and transmitted to the intermediate portion of the side member via the center pillar and to the rear portion of the side member via the impact beam.

The vehicle body structure according to the present invention includes a wheel house reinforcement member extending upward along the wheel house from a rear portion of the side member, and the wheel house reinforcement member overlaps the side member reinforcement member at or near a region where the rear portion of the impact beam is located in a vehicle side view.

According to the above aspect, the side collision load transmitted from the impact beam to the side member rear portion at the time of a side collision can be reliably received by the overlapping portion of the side member reinforcing member and the wheel house reinforcing member.

In an aspect of the present invention, the wheel house reinforcement member is joined to the side frame reinforcement member, and a rear portion of the impact beam overlaps a portion where the wheel house reinforcement member and the side frame reinforcement member are joined in a vehicle side view.

According to the above aspect, the side member rear portion can further reliably receive the side collision load input to the impact beam of the door at the time of a side collision.

In an aspect of the present invention, the side member reinforcing member includes a ridge line extending in a vehicle front-rear direction, the wheel house reinforcing member includes a ridge line extending in a vertical direction, and the ridge line extending in the vehicle front-rear direction and the ridge line extending in the vertical direction are continuous in a vehicle side view.

According to the above aspect, the side member reinforcing member includes the ridge line extending in the vehicle front-rear direction, whereby the bending rigidity in a vehicle plan view against a load on the inside in the vehicle width direction of the side member can be further improved.

Further, since the wheel house reinforcing member has the ridge line extending in the vertical direction, the bending rigidity in the vehicle side view and the torsional rigidity of the shaft extending in the longitudinal direction of the side member with respect to the load on the inside in the vehicle width direction of the side member can be further improved.

Then, by making these ridge lines continuous in the vehicle side view, the bending rigidity of the side member against a load inward in the vehicle width direction at the time of a side collision can be further improved.

As a technical solution of the present invention, in a side view of a vehicle, the impact beam overlaps with the center pillar.

According to the above aspect, at the time of a side collision, the side collision load received by the center pillar from the collision object can be reliably transmitted to the rear portion of the side member via the impact beam, and the side collision load received by the impact beam from the collision object can be reliably transmitted to the center pillar disposition region of the side member via the center pillar.

Therefore, for example, as compared with a structure in which only a portion such as a region where the center pillar is located is made strong, it is possible to suppress the weight of the side member and improve the bending rigidity against the vehicle width direction inner load input to the side member.

In an embodiment of the present invention, the side member reinforcing member includes an upper reinforcing member positioned at an upper portion of the side member and a lower reinforcing member positioned at a lower portion of the side member, and an outer wall reinforcing rib is provided on an outer wall of the side member positioned at a vertically intermediate position between the upper reinforcing member and the lower reinforcing member.

According to the above aspect, the bending rigidity of the load inward in the vehicle width direction at the time of a side member-to-side collision can be further improved.

Effects of the invention

According to the present invention, it is possible to suppress the weight of the side member from increasing and improve the bending rigidity against a load in the vehicle width direction at the time of a side collision.

Drawings

Fig. 1 is a perspective view of a main portion of a vehicle having a side body structure according to the present embodiment, as viewed from the right side of the vehicle body;

fig. 2 is a right side view of a main portion of a vehicle having a side body structure according to the present embodiment;

FIG. 3 is an enlarged view of a main portion of a rear periphery of the side member with the inner side member removed as viewed from the vehicle width inner side;

FIG. 4 is an enlarged view (a) of the main portion of FIG. 3 with the outside frame and the rear wheel house removed and an enlarged view (b) of the main portion with the second reinforcement member removed;

FIG. 5 is a sectional view of a main portion taken along the line D-D of FIG. 3;

FIG. 6 is an enlarged view of a main portion of the rear periphery of the side member in FIG. 1;

FIG. 7 is a cross-sectional view of a substantial portion thereof taken along the line E-E of FIG. 6;

fig. 8 is a perspective view of the joint portion between the side member and the center pillar and the periphery thereof viewed from the inside of the vehicle width with the inner side member removed;

FIG. 9 is an oblique view of FIG. 8 with the inner post removed;

FIG. 10 isbase:Sub>A cross-sectional view taken alongbase:Sub>A main portion of line A-A in FIG. 2, viewed in the direction of the arrows;

FIG. 11 is a cross-sectional view taken along a substantial part of the line B-B in FIG. 2, viewed in the direction of the arrows;

fig. 12 is a perspective sectional view of a main portion of the side body structure corresponding to a view in the direction of an arrow along the line C-C in fig. 2.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings.

In the figure, arrow F indicates the vehicle front, arrow U indicates the vehicle upper side, and arrow OUT indicates the vehicle width direction outer side (vehicle right side). In the following description, the vehicle width direction outer side (cabin outer side) is referred to as "vehicle width outer side", and the vehicle width direction inner side (cabin inner side) is referred to as "vehicle width inner side". The side body structure of the present embodiment described below is provided substantially bilaterally symmetrically on the left and right sides of the vehicle.

As shown in fig. 1, side

opening portions

2f,2r are formed in the vehicle body side portion, a roof side rail 3 extending in the front-rear direction is provided along upper edge portions of the side

opening portions

2f,2r, and a side rail 4 extending in the front-rear direction is provided along lower edge portions of the side

opening portions

2f, 2r.

A center pillar 5 extending in the vertical direction is provided at a vehicle longitudinal direction intermediate position of the side

opening portions

2f,2r, and an upper end of the center pillar 5 is joined to an intermediate portion of the roof side rail 3 extending in the vehicle longitudinal direction, and a lower end thereof is joined to an intermediate portion of the side rail 4 extending in the vehicle longitudinal direction.

Thus, the

side opening portions

2f and 2r are partitioned into the vehicle front and rear sides by the center pillar 5, and are provided as the vehicle entrance and exit

opening portions

2f and 2r (the front entrance and exit opening portion 2f and the rear entrance and exit opening portion 2 r), respectively.

The side body has a side door 6 that opens and closes front and rear vehicle entrance and

exit openings

2f and 2r. However, in fig. 2, the front side door (front side door) is not shown, and only a part of the rear side door 6 (rear side door 6) is shown.

The rear side door 6 includes a door body 61 including a door outer panel, a door inner panel, and the like, and a plurality of impact beams 63 extending in the vehicle front-rear direction, and the front ends thereof are supported by portions on the upper and lower sides of the center pillar 5 via unillustrated hinge brackets.

The door main body 61 is provided with an impact beam reinforcement 64 extending along the rear, front, and lower side portions thereof.

A plurality of impact beams 63 are provided at different heights respectively inside the door main body 61, and the plurality of impact beams 63 are provided between the front edge portion and the rear edge portion of the impact beam reinforcement 64 to connect the front edge portion and the rear edge portion of the impact beam reinforcement 64.

However, only the lowermost impact beam 63 among the plurality of impact beams 63 is illustrated in fig. 2, and the lowermost impact beam 63 will be described below.

As shown in fig. 2 and 5, the impact beam 63 has a substantially M-shaped cross section orthogonal to the longitudinal direction, and front and rear ends thereof are formed with a front flange 63f and a rear flange 63r that are wider than the middle portion in the longitudinal direction.

In the impact beam 63, a front flange 63f is fixed to a lower portion of a front side portion of the impact beam reinforcement 64 by a connecting means such as a bolt, and a rear flange 63r is fixed to corner portions 64c of a lower portion and a lower side portion of a rear side portion of the impact beam reinforcement 64 by a connecting means such as a bolt.

Thus, the impact beam 63 is inclined in a front-up-back-down manner at the lower portion of the rear side door 6.

Here, as described above, the coupling position of the rear flange 63r of the impact beam 63 and the rear side portion of the impact beam reinforcement 64 is also located at the lower end, that is, the corner portion 64c of the rear side portion and the lower side portion, in the lower portion of the rear side portion.

Thus, as shown in fig. 2, when the rear side upper and lower vehicle opening portion 2r is closed by the rear side door 6 (hereinafter referred to as "when the rear side door 6 is closed"), the front side flange 63f of the impact beam 63 (i.e., the joint portion with the front side portion of the impact beam reinforcement 64) overlaps the center pillar 5 in a vehicle side view, and as shown in fig. 2, 3, and 5, the rear side flange 63r of the impact beam 63 (i.e., the joint portion with the rear side portion of the impact beam reinforcement 64 and the corner portion 64c of the lower side portion) overlaps the rear portion of the side member 4 in a vehicle side view.

As shown in fig. 5 and 12, the side member 4 is a vehicle body rigid member having a closed cross-sectional space 4s extending in the vehicle front-rear direction, and includes a 1 st member 41, a 2 nd member 42, and a 3 rd member 43 constituting the closed cross-sectional space 4s, and an outer panel 44 (only shown in fig. 12) attached to the outermost side of the side member 4 in the vehicle width direction.

The 1 st member 41 is present on the vehicle width inner side of the side member 4 as a hat-shaped inner side member 4i protruding toward the vehicle width inner side in a cross section orthogonal to the vehicle front-rear direction. Specifically, the 1 st member 41 is integrally formed of: an upper end flange 41a extending in the vertical direction, an upper wall 41b extending inward in the vehicle width direction from a lower end of the upper end flange 41a, an inner wall 41c extending downward from an inner end of the upper wall 41b in the vehicle width direction, a lower wall 41d extending outward in the vehicle width direction from a lower end of the inner wall 41c, and a lower end flange 41e extending downward from an outer end of the lower wall 41d in the vehicle width direction.

The 2 nd member 42 and the 3 rd member 43 are provided as outer side members 4o on the vehicle width outer side with respect to the 1 st member 41, and the outer side members 4o are in a hat shape protruding toward the vehicle width outer side in a cross section orthogonal to the vehicle front-rear direction.

Specifically, the 2 nd member 42 is located at an upper portion and a middle portion in the vertical direction of the outer rail 4o, and is integrally formed by: an upper end flange 42a extending in the vertical direction, an upper wall 42b extending outward in the vehicle width direction from the lower end of the upper end flange 42a, an outer wall 42c extending downward in the vehicle width direction from the outer end of the upper wall 42b, and a lower end flange 42d extending inward in the vehicle width direction from the lower end of the outer wall 42 c. The 3 rd member 43 is located at a lower portion of the outer side member 4o, and integrally formed with a lower wall 43a extending inward in the vehicle width direction and a lower end flange 43b extending downward from a vehicle width inner end of the lower wall 43 a.

The upper end flange 41a of the 1 st member 41 and the upper end flange 42a of the 2 nd member 42 and the lower end flange 41e of the 1 st member 41 and the lower end flange 43b of the 3 rd member 43 are integrally joined by spot welding or the like, respectively. Further, the lower end flange 42d of the 2 nd member 42 is joined to the lower wall 43a of the 3 rd member 43 from above (the closed sectional space 4s side).

Thus, the side member 4 constitutes the closed cross-sectional space 4s inside the upper wall 41b, the inner wall 41c, and the lower wall 41d of the 1 st member 41, the upper wall 42b, and the outer wall 42c of the 2 nd member 42, and the lower wall 43a of the 3 rd member 43. In addition, the side member 4 is formed with

ridgelines

45a,45b,45c,45d extending in the vehicle front-rear direction between the upper wall 42b and the outer wall 42c, between the outer wall 42c and the lower end flange 42d, between the upper wall 41b and the inner wall 41c, and between the inner wall 41c and the lower wall 41 d. Among these

ridge lines

45a,45b,45c,45d, the ridge line 45a formed between the upper wall 42b and the outer wall 42c, that is, the ridge line 45a formed at the upper end of the outer wall 42c is set as the outer upper ridge line 45a, and the ridge line 45b formed between the outer wall 42c and the lower end flange 42d, that is, the ridge line 45b formed at the lower end of the outer wall 42c is set as the outer lower ridge line 45b.

As shown in fig. 5 and 12, an outer wall bead 42cc recessed toward the closed cross-sectional space 4s side near the center in the vertical direction is provided on the outer wall 42c of the side member 4.

As shown in fig. 5, 6, and 12, the 3 rd member 43 is further formed with a vehicle width outer end flange 43c extending outward in the vehicle width direction from the vehicle width outer end of the lower wall 43a, and the vehicle width outer end flange 43c extends outward in the vehicle width direction from an upper end portion of an overlapping portion 46 of the lower end flange 42d of the 2 nd member 42 and the lower wall 43a of the 3 rd member 43.

In a cross-sectional view orthogonal to the longitudinal direction of the side member 4, a vehicle-width outer end flange 43c protrudes outward and downward in the vehicle width direction from between the outer wall 42c and the lower wall 43a of the side member 4 so as to bend with respect to the outer wall 42c and the lower wall 43 a. Thus, a ridge line 43cc extending in the vehicle longitudinal direction is formed at the base end portion of the vehicle width outer end flange 43 c.

In a cross-sectional view orthogonal to the longitudinal direction of the side member 4, the ridge line 43cc coincides with the outer lower ridge line 45b or is located in the vicinity thereof. In this example, the ridge line 43cc at the base end portion of the vehicle width outer end flange 43c is located in the vicinity below the outer lower ridge line 45b.

As shown in fig. 9, a plurality of substantially circular through holes 47 are formed in the lower wall 43a of the 3 rd member 43 of the side member 4 in the vehicle front-rear direction. These through holes 47 are used for introducing an electrodeposition liquid or the like into the closed-section space 4s of the side member 4, or for inserting a rust inhibitor spraying gun (not shown) for spraying a rust inhibitor into the inner surface of the closed-section space 4s of the side member 4 into the closed-section space 4s.

As shown in fig. 12, a floor panel 100 is provided between the side members 4 provided on both sides of the lower portion of the vehicle body, and a tunnel portion, not shown, that bulges upward at the center portion in the vehicle width direction and extends in the vehicle front-rear direction is formed in the floor panel 100. As shown in fig. 11, a rear end portion of the floor panel 100 is provided with a bent-up portion 101 rising upward from the rear end portion.

As shown in fig. 11 and 12, a front cross member 110 (2.0 cross member) and a middle cross member 120 (2.5 cross member) extending in the vehicle width direction are provided on the upper surface of the floor panel 100 on both sides of the tunnel portion, and the front cross member 110 and the middle cross member 120 connect the side members 4 and the tunnel portion, respectively. The front cross member 110 and the middle cross member 120 are formed in a hat shape that opens downward in a cross-sectional view orthogonal to the vehicle front-rear direction, and form a closed cross-sectional space extending in the vehicle width direction with the floor panel 100.

Further, a rear cross member 130 (3.0 cross member) is joined and fixed to the upper rear surface of the upper curved portion 101, and the rear cross member 130 has a closed cross-sectional space extending in the vehicle width direction.

The

cross members

110, 120, and 130 are provided apart from each other in the vehicle front-rear direction, and in this example, in the vehicle front-rear direction, the front side cross member 110 is located at an intermediate portion of the front side opening 2f for pick-up and drop-off, the middle cross member 120 is located at the center pillar 5, and the rear side cross member 130 is located at an intermediate portion of the rear side opening 2r for pick-up and drop-off.

As shown in fig. 11, the

cross members

110, 120, 130 have

flanges

110a,120a,130a formed at the outer ends in the vehicle width direction, and these

flanges

110a,120a,130a are all joined to the inner wall 41c of the side member 4, and can receive the load transmitted from the side member 4 to the vehicle width inner side.

As shown in fig. 1 to 3, a rear wheel house 90 that forms a rear lower portion from a lower rear portion of the rear side boarding/alighting opening 2r is provided behind the side member 4. As shown in fig. 7, the rear wheel house 90 has an arcuate rear wheel house inner piece 91 and a rear wheel house outer piece 92, both of which project upward in a vehicle side view, through which the rear wheel is received from above.

As shown in fig. 3 and 11, the front lower portion 92a of the rear wheel house outer 92 is joined to the rear end of the side member 4.

As shown in fig. 9 to 12, the side member 4 has joints 21f,21r,22f,22r that partition the closed cross-sectional space 4s in the vehicle front-rear direction.

The side member 4 has a plurality of links 21f,21r,22f,22r in the vehicle longitudinal direction, and in this example, is provided at least 4 points of the front and rear portions of the center pillar arrangement region 4Ra in the longitudinal direction of the side member 4 and the front and rear portions with respect to the center pillar arrangement region 4 Ra.

The center pillar arrangement region 4Ra is located at a vehicle front-rear direction intermediate portion of the side member 4.

The sections 21f,21r,22f,22r are set as a column front section 21F, a column front section 22F, a column rear section 22R, and a column rear section 21R in this order from front to rear.

As shown in fig. 9 and 10, each of the pillar front section 22F and the pillar rear section 22R has a vertical wall 22a that partitions the closed sectional space 4s in the vehicle front-rear direction. As shown in fig. 9, 10, 11, and 12, the pillar front joint 21F and the pillar rear joint 21R are constituted by an outer joint constituting member 23 located on the vehicle width outer side and an inner joint constituting member 24 located on the vehicle width inner side.

As shown in fig. 10, the outer-section constituting member 23 has a front wall 23a and a rear wall 23b provided separately in the vehicle longitudinal direction, and the inner-section constituting member 24 has a vertical wall 24a extending in the vertical direction and the vehicle width direction.

The pillar front section 22F is partitioned by a vertical wall 22a from the vehicle width outer side of the closed cross-sectional space 4s. The pillar front joint 21F partitions the vehicle width outer side of the closed cross-sectional space 4s by the front wall 23a and the rear wall 23b of the outer joint member 23, and partitions the vehicle width inner side of the closed cross-sectional space 4s by the vertical wall 24a of the inner joint member 24.

The outer member 4o constituted by the 2 nd member 42 and the 3 rd member 43 is provided with the 1 st reinforcing member 30u,30d and the 2 nd reinforcing member 31 for reinforcing the bending rigidity against the load on the vehicle width inner side.

As shown in fig. 5, 9, and 12, 1 st reinforcing members 30u and 30d include 1 st upper reinforcing member 30U positioned at an upper portion of side member 4 and 1 st lower reinforcing member 30D positioned at a lower portion of side member 4.

As shown in fig. 5, 8, 9, and 12, an outer wall bead 42cc is provided at an intermediate position between the 1 st upper reinforcement member 30U and the 1 st lower reinforcement member 30D in the vertical direction of the outer wall 42c of the side member.

As shown in fig. 9 to 11, the 1 st upper reinforcement member 30U is joined to the side member 4 at the height position of the center pillar joining section 4A.

The 1 st upper reinforcement member 30U is integrally formed in a substantially L-shape in an orthogonal cross-sectional view in the vehicle front-rear direction by: a lateral side portion 33 (see fig. 11 and 12) extending in the vehicle width direction along the upper wall 42b of the 2 nd member 42 of the side member 4, and a longitudinal side portion 34 extending downward from the vehicle width outer end of the lateral side portion 33.

The 1 st upper reinforcing member 30U is provided partially in an orthogonal cross sectional view in the longitudinal direction of the side member 4.

Specifically, as shown in fig. 5 and 12, the 1 st upper side reinforcement member 30U is joined to the side member 4, and covers only one ridge line (the ridge line 45a in this example) among a plurality of (4 in this example)

ridge lines

45a,45b,45c, and 45d extending in the longitudinal direction of the side member 4.

More specifically, as shown in the drawing, at the corner portion between the upper wall 42b and the outer wall 42c of the 2 nd member 42 of the side member 4, the 1 st upper side reinforcement member 30U abuts the ridge line 35 between the lateral side portion 33 and the longitudinal side portion 34 against the outer upper ridge line 45a of the corner portion, and the lateral side portion 33 is disposed on the upper wall 42b of the 2 nd member 42 from the closed cross-sectional space 4s side and the longitudinal side portion 34 is disposed on the outer wall 42c of the 2 nd member 42 from the closed cross-sectional space 4s side, and is joined at a plurality of places in the vehicle longitudinal direction by welding or the like.

As shown in fig. 1, 2, 10, and 12, the 1 st lower reinforcing member 30D is joined to the side member 4 at a position lower than the height position of the center pillar joining section 4A.

Specifically, as shown in fig. 12, the 1 st lower reinforcing member 30D is integrally formed in a substantially L-shape in an orthogonal cross-sectional view in the vehicle front-rear direction by: the lateral side portion 36 extending in the vehicle width direction along the lower wall 43a of the 3 rd member 43 of the side member 4, and the longitudinal side portion 37 extending upward from the vehicle width outer end of the lateral side portion 36. Then, at the corner portions of the outer wall 42c of the 2 nd member 42 and the lower wall 43a of the 3 rd member 43 of the side member 4, the 1 st lower side reinforcing member 30D abuts the ridge lines 38 of the vertical side portion 37 and the horizontal side portion 36 against the outer lower ridge line 45b of the corner portion, and the vertical side portion 37 is disposed on the outer wall 42c of the 2 nd member 42 from the closed cross-sectional space 4s side and the horizontal side portion 36 is disposed on the lower wall 43a of the 3 rd member 43 from the closed cross-sectional space 4s side via the lower end flange 42D of the 2 nd member 42, and is joined by welding or the like at a plurality of places in the vehicle front-rear direction.

As shown in fig. 3, 5, and 9 to 12, each of the 1 st upper reinforcement member 30U and the 1 st lower reinforcement member 30D extends continuously in the vehicle front-rear direction from a front position with respect to the center pillar 5 to a rear portion of the side member 4 in the longitudinal direction of the side member 4 so as to straddle the center pillar 5.

To explain the 1 st upper reinforcement member 30U in detail, as shown in fig. 9 to 11, the front end of the 1 st upper reinforcement member 30U extends to a position forward of the pillar front section 21F, and as shown in fig. 11, extends to a position overlapping with the front side cross member 110 in a vehicle side view.

As shown in fig. 9 and 11, the rear end of the 1 st upper side reinforcement member 30U extends to a rear position with respect to the pillar rear joint 21R, and as shown in fig. 11, extends to a rear position with respect to the rear cross member 130.

That is, the 1 st upper side reinforcement member 30U is provided in the vehicle longitudinal direction across the pillar front section 21F, the pillar front section 22F, the pillar rear section 22R, and the pillar rear section 21R, and is provided across the front cross member 110, the middle cross member 120, and the rear cross member 130.

As shown in fig. 1, 3, 4 (a), and 5 to 7, the 2 nd reinforcing member 31 is provided at the rear portion of the side member 4, and extends upward from the rear portion of the side member 4 along the rear wheel house 90.

As shown in fig. 6, the 2 nd reinforcing member 31 has an upward extending portion 31u extending upward and a forward extending portion 31f extending forward, and at a corner portion in a vehicle side view of the front lower portion 92a of the rear wheel house outer 92 and the rear portion of the side member 4, the upward extending portion 31u is joined to the front lower portion 92a of the rear wheel house outer 92 by welding or the like and the forward extending portion 31f is joined to the rear portion of the side member 4 by welding or the like, as shown in fig. 5 to 7.

In other words, as shown in fig. 4 (a), 5, 6, and 7, the 2 nd reinforcing member 31 is integrally formed in a substantially triangular shape in a side view of the vehicle by: a side wall 31a extending in the vertical direction and the vehicle longitudinal direction, a vertical wall 31b extending inward in the vehicle width from an upper edge of the side wall 31a, and a flange 31c extending upward from an inner end of the vertical wall 31b in the vehicle width direction.

The 2 nd reinforcing member 31 has

ridges

31d and 31e continuously extending in the extending direction of the 2 nd reinforcing member 31 between the side wall 31a and the vertical wall 31b and between the vertical wall 31b and the flange 31c, respectively. These

ridge lines

31d and 31e extend in the upper extending portion 31u substantially in the vertical direction, and extend in the front extending portion 31f substantially in the vehicle front-rear direction.

As shown in fig. 6, the forward extending portion 31f of the 2 nd reinforcing member 31 is joined to the rear portion and the upper portion of the side member 4 from the vehicle width outer side. Specifically, as shown in fig. 5 and 6, in the 2 nd reinforcing member 31, the flange 31c of the front extension 31f is joined to the upper end flange 42a of the 2 nd member 42 of the side member 4 so as to cover from the vehicle width outer side, the side wall 31a of the front extension 31f is joined to the outer wall 42c of the 2 nd member 42 so as to cover from the vehicle width outer side, and the vertical wall 31b of the front extension 31f is joined to the upper wall 42b of the 2 nd member 42 so as to cover from above.

As a result, as shown in fig. 3, 4 (a) (b), and 5, the front extension 31f, which is the front portion of the 2 nd reinforcing member 31, is positioned on the vehicle width outer side with respect to the rear portion of the 1 st upper reinforcing member 30U at the rear portion of the side member 4, and overlaps with the rear portion of the 1 st upper reinforcing member 30U in a vehicle side view (i.e., vehicle width direction).

As shown in fig. 3, 4 (a) and 5, the 2 nd reinforcing member 31 overlaps the rear end flange 63r of the impact beam 63 at the rear of the side member 4 in the vehicle side view.

Specifically, when the rear side door 6 is closed, the impact beam 63 at the lower portion of the rear side door 6 is positioned such that the rear end flange 63r overlaps the rear portion of the side member 4 in the vehicle side view. Therefore, as shown in fig. 3, 4 (a) (b), and 5, the rear end flange 63r of the impact beam 63, the front extension 31f of the 2 nd reinforcing member 31, the 2 nd member 42 of the side member 4, and the rear portion of the 1 st upper reinforcing member 30U are provided in this order from the outside toward the inside in the vehicle width direction at the rear portion of the side member 4, and these members overlap each other in a vehicle side view.

In this example, the 3 members are integrated by spot welding at the overlapping portions of the 2 nd reinforcing member 31 and the 2 nd member 42 and the 1 st upper reinforcing member 30U of the side member 4. The "x" in fig. 3 and 4 (a) indicates the joint wa, wb.

In other words, as shown in fig. 5, the 2 nd reinforcing member 31 and the 1 st upper reinforcing member 30U sandwich the 2 nd member 42 of the side member 4 and are joined to each other at the above-described joints wa, wb.

In addition, as shown in fig. 4 (a), in the vehicle side view, the rear end flange 63r of the impact beam 63 overlaps with a portion (at least the joint wa) where the 2 nd reinforcement member 31 and the 1 st upper side reinforcement member 30U are joined.

As shown in fig. 5 and 12, the ridge line 35 of the 1 st upper reinforcement member 30U between the lateral side portion 33 and the longitudinal side portion 34 extends in the vehicle longitudinal direction over the entire length of the 1 st upper reinforcement member 30U.

On the other hand, as shown in fig. 4 (a) and 6, as described above, the

ridge lines

31d and 31e of the 2 nd reinforcing member 31 extend in the substantially vertical direction in the upward extending portion 31u located at the rear portion of the 2 nd reinforcing member 31, and extend in the substantially vehicle longitudinal direction in the forward extending portion 31f located at the front portion of the 2 nd reinforcing member 31.

In this example, the rear portion of the ridge line 35 extending in the front-rear direction and the lower portion (front portion) of the

ridge lines

31d and 31e extending in the up-down direction are continuous in the vehicle side view (see fig. 4a, 5, 6, and 12).

As shown in fig. 1, 8, and 9, the center pillar 5 includes an inner pillar 51 and an outer pillar 52, and the center pillar 5 is erected on the side member 4 by joining lower portions of the inner pillar 51 and the outer pillar 52 to the side member 4. The lower portion of the center pillar 5 (the region in contact with the side member 4) gradually increases in width in the vehicle longitudinal direction from the vicinity of the upper end 52a (see fig. 1, 2, and 9) of the lower portion to the upper end of the side member 4.

As shown in fig. 8, the inner pillar 51 has a vertical wall shape (substantially flat plate shape) extending in the vehicle width direction over substantially the entire vertical direction, and a flange 51d is formed on each of the front and rear sides thereof.

As shown in fig. 1, 8, and 9, the outer pillar 52 is integrally formed in a hat-shaped cross-sectional shape that is open toward the vehicle width inner side in a vertical cross-sectional view that is orthogonal to the vertical direction, substantially entirely, by: an outer wall 52b extending in the vertical direction and the vehicle width direction, front and rear vertical walls 52c extending inward in the vehicle width direction from front and rear ends of the outer wall 52b, and front and rear flanges 52d formed along the vertical walls 52 c.

The center pillar 5 is constructed by joining the respective

front edge flanges

51d,52d and the respective

rear edge flanges

51d,52d of the inner and

outer pillars

51, 52 to each other, with a closed cross-sectional space 5s extending in the up-down direction therebetween.

The lower portion of the outer column 52 is joined to the 2 nd member 42 of the side member 4, and this joined structure will be described.

As shown in fig. 1, 2, and 10, a lower end flange 52e extending downward from the lower end of the outer wall 52b is formed at the lower portion of the outer pillar 52, and the lower end flange 52e is joined to the outer wall 42c of the 2 nd member 42 of the side member 4. Thus, as shown in fig. 1 and 10, the outer wall 52b of the center pillar 5 and the outer wall 42c of the side member 4 are disposed substantially on a single plane in the vehicle width direction. Further, as described above, the front and rear flanges 52d of the outer pillar 52 and the front and rear flanges 51d of the inner pillar 51 are integrally joined, and as shown in fig. 8, the lower portions of the front and

rear flanges

51d,52d are integrally joined with the upper end flange 42a of the 2 nd member 42 on the side of the outer rail 4o sandwiched therebetween from the inner and outer sides in the vehicle width direction. Thus, the front and

rear flanges

51d and 52d of the center pillar 5 and the upper end flange 42a of the side member 4 are arranged substantially flush with each other in the vehicle width direction.

In this state, as shown in fig. 1, the lower end of the longitudinal wall 52c on each of the front and rear sides of the outer pillar 52 is in contact with the upper wall 42b of the 2 nd member 42 of the side member 4, and the corner portion between the longitudinal wall 52c on each of the front and rear sides extending in the up-down direction and the upper wall 42b of the 2 nd member 42 of the side member 4 extending in the front-rear direction extends continuously and smoothly in a vehicle side view.

The inner pillar 51 is formed at a lower portion having a large width corresponding to a lower portion of the outer pillar 52 in the vehicle front-rear direction, and is formed with an extension portion 55 extending downward from an upper end position of the side member 4.

Specifically, as shown in fig. 8 and 10, in the center pillar arrangement region 4Ra in the vehicle front-rear direction of the side member 4, the extending portion 55 is provided in the closed cross-sectional space 4s, and divides the closed cross-sectional space 4s into the inside and the outside in the vehicle width direction. As shown in fig. 8, the upper end 55u of the extension 55 is provided between the upper end flange 41a of the 1 st member 41 and the upper end flange 42a of the 2 nd member 42 of the side member 4, and is integrally joined to the

upper end flanges

41a, 42a. And the lower end 55d of the extension 55 is disposed between the lower end flange 41e of the 1 st member 41 and the lower end flange 43b of the 3 rd member 43 of the side member 4, and is integrally joined to the

lower end flanges

41e, 43b.

As described above, the lower portion of the inner pillar 51 includes the extension portion 55 and has a large width in the vehicle front-rear direction.

Further, as shown in fig. 8, the inner post 51 has an inner post upper member 56 and an inner post lower member 57 below the inner post upper member 56. The lower portion of the inner pillar upper 56 and the upper portion of the inner pillar lower 57 overlap in the vehicle width direction in the closed cross-sectional space 4s of the side member 4. That is, as shown in fig. 8 and 10, an overlapping portion 58 of the lower portion of the inner pillar upper 56 and the upper portion of the inner pillar lower 57 is provided on the extension portion 55, and the lower portion of the inner pillar upper 56 and the upper portion of the inner pillar lower 57 are joined at a plurality of places in the vehicle front-rear direction of the extension portion 55 by spot welding or the like (see "x" in fig. 8).

As shown in fig. 10, the pillar front section 22F and the pillar rear section 22R are both provided on the vehicle width outer side with respect to the extension portion 55 in the closed cross-sectional space 4s of the side member 4, the pillar front section 22F is separated from the front side of the extension portion 55 in the vehicle front-rear direction, and the pillar rear section 22R is separated from the rear side of the extension portion 55 in the vehicle front-rear direction.

As shown in fig. 1 and 2, the side body structure of the present embodiment includes: side member 4: has a closed cross-sectional space 4s (see fig. 10) (closed cross-sectional structure) extending in the vehicle longitudinal direction, a wheel house 90 having a front lower portion 92a rising from the rear of the side member 4, a center pillar 5: the side member 4 has a closed cross-sectional space 5s (closed cross-sectional structure) (see fig. 8) extending upward from an intermediate portion thereof, and a rear side door 6 (see fig. 2) that opens and closes a rear vertical opening 2r, which is an opening formed above the side member 4 and behind the center pillar 5. In this side body structure, as shown in fig. 2, when the rear door 6 is closed, a rear flange 63r (rear portion) of the impact beam 63 on the rear door 6 overlaps with the rear portion of the side member 4 in a vehicle side view (i.e., in the vehicle width direction), and as shown in fig. 3, 4 (a) (b), 5, and 9 to 11, the side member 4 has a side member reinforcing member for reinforcing bending rigidity against a load on the vehicle width inner side, that is, a 1 st upper reinforcing member 30U, and as shown in fig. 9 to 11, the 1 st upper reinforcing member 30U is provided at least in an intermediate portion (center pillar disposition region 4 Ra) of the side member 4 where the center pillar 5 is disposed in the longitudinal direction (vehicle front-rear direction) on the side member 4 and in the rear portion of the side member 4 as shown in fig. 3 and 11.

According to the above-described configuration, when the rear side door 6 is closed, the rear side flange 63r of the impact beam 63 on the rear side door 6 overlaps the rear portion of the side member 4 in the vehicle side view, and the side member 4 including the rear portion thereof is reinforced by the first upper side reinforcement member 30U, so that the side impact load input to the impact beam 63 of the rear side door 6 can be reliably received by the rear portion of the side member 4 at the time of a vehicle side impact (hereinafter referred to as "side impact time").

Further, since the front lower portion 92a of the rear wheel house 90 stands upright from the rear portion of the side member 4 (see fig. 1 and 3), the rear portion of the side member forms an L-shaped region in the vehicle side view together with the front lower portion 92a of the rear wheel house 90 (rear wheel house outer 92), and the load transmitted from the impact beam 63 to the rear portion of the side member 4 can be dispersed and received by the L-shaped region at the time of a side collision. In this way, the side collision load can be effectively received by the member including the rear wheel house 90 as the vehicle body component, and thus the structure of the 1 st upper reinforcement member 30U can be simplified and the weight can be reduced as compared with the case where the side collision load is received only by the 1 st upper reinforcement member 30U itself.

In short, according to the above-described configuration, since the 1 st upper reinforcing member 30U is provided at least at the intermediate portion (4 Ra) of the side member 4 in the longitudinal direction and at the rear portion of the side member 4, the side collision load can be reliably received when the side collision load is dispersed and transmitted to the intermediate portion (4 Ra) of the side member 4 by the center pillar 5 and dispersed and transmitted to the rear portion of the side member 4 by the impact beam 63.

Therefore, the bending rigidity of the side member 4 against a load inward in the vehicle width direction at the time of a side collision can be increased while suppressing the weight of the vehicle body (the side member 4).

Here, the 1 st upper-side reinforcement member 30U may be provided at least in the center pillar placement region 4Ra and the rear portion in the longitudinal direction of the side member 4, or may be provided discontinuously with a center broken (not shown), but as in this example, by being provided continuously from the center pillar placement region 4Ra to the rear portion of the side member 4 in the longitudinal direction of the side member 4 (see fig. 11), the load transmitted from the impact beam 63 to the rear portion of the side member 4 can be dispersed from the rear portion of the side member 4 to the center pillar placement region 4Ra by the 1 st upper-side reinforcement member 30U at the time of a side collision, and therefore, the reinforcing effect of the 1 st upper-side reinforcement member 30U on the side member 4 can be improved, which is preferable from the viewpoint.

In this case, as in this example, it is more preferable that the 1 st upper side reinforcing member 30U is partially provided, and is provided only at an upper portion or the like corresponding to the height of the center pillar joining section 4A joined to the center pillar 5 in the cross-sectional view orthogonal to the longitudinal direction of the side member 4 (see fig. 5 and 12), in view of the above, in a structure provided continuously in the longitudinal direction of the side member 4, to suppress the weight of the side member 4.

The present invention is configured to include a 2 nd reinforcement member 31 (wheel house reinforcement member) extending upward from the rear portion of the side member 4 along the rear wheel house 90, and the 2 nd reinforcement member 31 overlaps the 1 st upper reinforcement member 30U in a vehicle side view (i.e., in the vehicle width direction) in a region where the rear flange 63r (rear portion) of the impact beam 63 is located (see fig. 4a and 5).

According to the above-described configuration, the side collision load transmitted from the impact beam 63 to the rear portion of the side member 4 at the time of a side collision can be received by the overlapping portion of the 1 st upper reinforcement member 30U and the 2 nd reinforcement member 31.

As an aspect of the present invention, the 2 nd reinforcement member 31 is joined to the 1 st upper reinforcement member 30U, and the rear side flange 63r of the impact beam 63 overlaps with a portion where the 2 nd reinforcement member 31 and the 1 st upper reinforcement member 30U are joined in a vehicle side view (see fig. 3 and 4 (a)).

According to the above-described configuration, the side collision load input to the impact beam 63 of the rear side door 6 during a side collision can be received more reliably by the rear portions of the side members 4.

As an embodiment of the present invention, the 1 st upper reinforcing member 30U has a ridge line 35 extending in the vehicle longitudinal direction (see fig. 5, 11, and 12), and the 2 nd reinforcing member 31 has

ridge lines

31d and 31e extending in the vertical direction (see fig. 5 to 7), and the ridge line 35 extending in the vehicle longitudinal direction and the

ridge lines

31d and 31e extending in the vertical direction are continuous in a vehicle side view (see fig. 5, 6, 11, and 12).

According to the above aspect, the 1 st upper reinforcement member 30U has the ridge line 35 extending in the vehicle front-rear direction, and thus the bending rigidity in the vehicle plan view of the load on the vehicle width inner side of the side member 4 can be further increased.

The 2 nd reinforcing member 31 has

ridge lines

31d,31e extending in the vertical direction, and thus the bending rigidity in the vehicle side view against the load on the vehicle width inner side of the side member 4 and the torsional rigidity of the shaft extending in the longitudinal direction around the side member 4 can be further improved.

Then, these

ridge lines

35, 31d, and 31e continue in the vehicle side view, and thereby the bending rigidity of the side member 4 against a load inward in the vehicle width direction at the time of a side collision can be further improved.

As an aspect of the present invention, the impact beam 63 overlaps the center pillar 5 in a vehicle side view (i.e., in the vehicle width direction) (see fig. 2).

According to the above-described aspect, when the rear side door 6 is closed, the front flange 63f (front portion) of the impact beam 63 and the center pillar 5 overlap in the vehicle side view, so that during a side collision, the side collision load received by the center pillar 5 from the collision object can be transmitted to the rear portion of the side member 4 via the impact beam 63, and the side collision load received by the impact beam 63 from the collision object can be transmitted to the center pillar disposition region 4Ra of the side member 4 via the center pillar 5.

Therefore, for example, as compared with a configuration in which only a portion of the region where the center pillar 5 is located is made strong, the weight of the side member 4 can be suppressed, and the bending rigidity against the vehicle width direction inner side load input to the side member 4 can be improved.

In the present invention, the side member reinforcing member includes the 1 st upper reinforcing member 30U (upper reinforcing member) positioned at the upper portion of the side member 4 and the 1 st lower reinforcing member 30D (lower reinforcing member) positioned at the lower portion of the side member 4, and an outer wall bead 42cc (see fig. 5, 8, 9, and 12) is provided on the outer wall 42c of the side member 4 positioned at the middle in the vertical direction between the 1 st upper reinforcing member 30U and the 1 st lower reinforcing member 30D.

According to the above-described aspect, the bending rigidity of the side member 4 against the load inward in the vehicle width direction at the time of a side collision can be further improved.

The present invention is not limited to the structure of the above-described embodiment, and can be formed in various embodiments.

Description of the numbering

2r rear side upper and lower openings (openings)

4. Side beam

4Ra Central column configuration region (side beam middle part)

4s closed section space (closed section structure)

5s closed cross-section space

6. Rear side door (vehicle door)

30U 1 st upper side reinforcement (side beam reinforcement)

30D 1 st lower reinforcing member (side beam reinforcing member)

31. No. 2 reinforcing member (wheel cover reinforcing member)

31d,31e ridge extending in the vertical direction

35. Ridge extending in the front-rear direction of the vehicle

63. Anti-collision beam

63r rear flange (rear of anti-collision beam)

90. Rear wheel cover (wheel cover)

92a front lower part

Claims

1. A side vehicle body structure characterized by comprising:

a side member having a closed cross-sectional structure extending in a vehicle front-rear direction;

a wheel house, a front lower portion of which is erected from a rear portion of the side member;

a center pillar having a closed cross-sectional structure extending upward from a middle portion of the side member;

a door that opens and closes an opening that forms an opening above the side member and behind the center pillar;

a wheel house reinforcement member extending upward along the wheel house from a rear portion of the side member;

wherein a rear portion of an impact beam on the door overlaps with a rear portion of the side member in a vehicle side view when the door is closed,

the side member includes a side member reinforcing member for reinforcing bending rigidity against a load inward in a vehicle width direction,

the side member reinforcing member is provided at least at a middle portion of the side member where the center pillar is located and at a rear portion of the side member in a longitudinal direction of the side member;

the wheel house reinforcement member overlaps the side sill reinforcement member at or near a region where the rear portion of the impact beam is located in a side view of the vehicle.

2. The side body structure according to claim 1, wherein:

the wheel house reinforcement member is joined to the side member reinforcement member, and a rear portion of the impact beam overlaps with a portion where the wheel house reinforcement member and the side member reinforcement member are joined in a vehicle side view.

3. The side body structure according to claim 2, wherein:

the side sill reinforcing member includes a ridge line extending in a vehicle front-rear direction, the wheel house reinforcing member includes a ridge line extending in an up-down direction,

the ridge line extending in the vehicle front-rear direction and the ridge line extending in the up-down direction are continuous in the vehicle side view.

4. The side body structure according to any one of claims 1 to 3, wherein:

the impact beam overlaps the center pillar in a side view of the vehicle.

5. The side body structure according to any one of claims 1 to 3, wherein:

the side sill reinforcing member has an upper side reinforcing member located at an upper portion of the side sill and a lower side reinforcing member located at a lower portion of the side sill,

an outer wall reinforcing rib is provided on an outer wall of the side member located at a middle in a vertical direction between the upper reinforcing member and the lower reinforcing member.